They don't make bulk packs of senkos anymore right? 

If you're talking the 20-packs...this place has them

https://www.tournamenttackle.com/Gary-Yamamoto-Senko

Thank you, looking for six inch 

Senkos are only $6.34 a 10pk at our Tulsa wally worlds.  They really haven't gone up in price like other soft plastics.  

$7.99 for the 6 packs anywhere here. No 20’s to be found locally. 

If I had to have a bunch of senkos in the same color I'd call up Yamamoto and ask how much.

Stik O 5 3/4" the most identical lure to Senko with the same fall rate. you can give it a try.